// SPDX-FileCopyrightText: 2019-Present Christian Kußowski
// SPDX-FileCopyrightText: 2019-Present Contributors to FluffyChat
//
// SPDX-License-Identifier: AGPL-3.0-or-later

import 'package:material_ui/material_ui.dart';
import 'package:matrix/matrix.dart';
import 'package:tatchat/l10n/l10n.dart';
import 'package:tatchat/utils/miniapp_store.dart';

/// ID of the built-in tasks example app.
const String miniAppTasksId = 'tasks';

/// ID of the built-in account data explorer app.
const String miniAppAccountDataId = 'accountdata';

/// Static registry of all built-in mini apps that ship with this build. A mini
/// app only shows up in the "Apps" page once the user installs it (see
/// [installedMiniApps]). Additionally to this list, users can import their own
/// single-file HTML apps which are resolved through [resolveMiniAppConfig].
const List<MiniAppConfig> availableMiniApps = [
  MiniAppConfig(
    id: miniAppTasksId,
    icon: Icons.checklist_rounded,
    color: Color(0xFF00D084),
    htmlAsset: 'assets/miniapps/tasks.html',
  ),
  MiniAppConfig(
    id: miniAppAccountDataId,
    icon: Icons.storage_rounded,
    color: Color(0xFF1F8EF1),
    htmlAsset: 'assets/miniapps/accountdata.html',
  ),
];

/// Declarative description of a mini app. The rendering is either a
/// self-contained HTML document loaded from [htmlAsset] (built-in apps) or
/// from [html] which is stored in the user's account data (imported apps).
class MiniAppConfig {
  final String id;
  final IconData icon;
  final Color color;
  final String? name;
  final String? htmlAsset;
  final String? html;

  const MiniAppConfig({
    required this.id,
    required this.icon,
    required this.color,
    this.name,
    this.htmlAsset,
    this.html,
  });

  /// Config for a user-imported app whose HTML source is persisted in the
  /// account data store.
  MiniAppConfig.custom({
    required String id,
    String? name,
    String? html,
  }) : this(
         id: id,
         icon: Icons.web_asset_rounded,
         color: const Color(0xFF9C27B0),
         name: name,
         html: html,
       );

  bool get isCustom => html != null || htmlAsset == null;

  /// Resolves the HTML source that should be rendered for this app. Returns a
  /// bundled asset path for built-in apps or the raw HTML for imported apps.
  String? get htmlSource => html ?? htmlAsset;
}

/// Resolves the config of a single installed app, whether it is built-in or
/// user-imported. Returns null if the app is not installed or not available.
MiniAppConfig? resolveMiniAppConfig(Client client, String appId) {
  for (final app in availableMiniApps) {
    if (app.id == appId) return app;
  }
  if (client.isMiniAppInstalled(appId)) {
    final html = client.getMiniAppSource(appId);
    if (html != null) {
      return MiniAppConfig.custom(
        id: appId,
        name: client.getMiniAppName(appId),
        html: html,
      );
    }
  }
  return null;
}

/// Returns the configs of all installed apps: built-in ones plus the
/// user-imported ones. The visual order is: installed built-in apps first,
/// then imported apps.
List<MiniAppConfig> installedMiniAppConfigs(Client client) {
  final installed = client.installedMiniApps;
  return [
    for (final app in availableMiniApps)
      if (installed.contains(app.id)) app,
    for (final id in installed)
      if (!availableMiniApps.any((app) => app.id == id))
        if (client.getMiniAppSource(id) != null)
          MiniAppConfig.custom(
            id: id,
            name: client.getMiniAppName(id),
            html: client.getMiniAppSource(id),
          ),
  ];
}

/// Resolves the localized display name of a mini app configuration.
String miniAppName(BuildContext context, MiniAppConfig app) {
  final customName = app.name;
  if (customName != null && customName.isNotEmpty) return customName;
  switch (app.id) {
    case miniAppTasksId:
      return L10n.of(context).tasks;
    case miniAppAccountDataId:
      return L10n.of(context).accountDataEditor;
    default:
      return app.id;
  }
}